Why Your House Smells Like Poop Due to the Septic System

2. Full or Overfilled Septic Tank

If your septic tank is too full or hasn’t been pumped in several years, it can lead to a backup of waste. When the tank becomes overfilled, waste doesn’t break down properly, and the system may become overwhelmed. This can cause waste and gases to leak out of the tank and into the house, resulting in a strong, unpleasant smell.

What You Can Do:

• Pump the Septic Tank: If it has been more than 3-5 years since the last pump-out, schedule a septic tank pumping. Regular maintenance is essential to keep the system functioning properly and prevent odors.
• Monitor Water Usage: Reduce excessive water usage in your household to prevent the tank from overfilling too quickly. Avoid running multiple appliances (like washing machines or dishwashers) at once, which can overload the system.

3. Septic System Backflow

If there is a problem with the septic system’s drain field or the septic tank itself, waste can back up into the house. This can cause raw sewage to enter the plumbing lines and result in foul odors throughout the house. Backflow can occur when the drain field is clogged, damaged, or overloaded, preventing waste from properly filtering into the soil.

What You Can Do:

• Inspect the Drain Field: If you notice sewage odors outside or waste pooling on your lawn, it could be a sign of drain field failure. Contact a septic professional to inspect the drain field for clogs, damage, or other issues.
• Have the System Inspected: A plumber or septic service provider can evaluate your system to ensure that there are no blockages or failures causing waste to back up into your house. They may need to repair or replace damaged parts of the system.

4. Biofilm Buildup or Bacterial Imbalance

A septic tank relies on bacteria to break down waste. However, over time, a biofilm (a layer of bacteria and other organic matter) can build up inside the tank and the pipes leading to the system. If the bacteria in your septic system aren’t functioning properly due to an imbalance (often caused by the use of harsh chemicals), waste can accumulate and produce stronger odors, even inside your house.

What You Can Do:

• Use Septic-Safe Products: Avoid using harsh chemicals or non-biodegradable cleaning products, as these can kill the beneficial bacteria in your system. Instead, use products specifically designed for septic systems that promote healthy bacterial activity.
• Restore Bacteria Balance: Consider using a septic tank treatment to introduce beneficial bacteria and enzymes to help break down waste more efficiently. This can help reduce odors and improve overall system function.

5. Dry or Disrupted Drain Seals

Another reason your home may smell like poop is due to dry or disrupted drain seals. Toilets, sinks, and floor drains have water seals that prevent sewage gases from entering your home. If these seals dry out, break, or become damaged, gases from the septic system can easily enter your living space, causing a strong odor.

What You Can Do:

• Check Water Levels in Toilets: If the water level in your toilet bowl is too low or has evaporated, flush the toilet several times to restore the water seal. Ensure that water is present in all drains to prevent odors from escaping.
• Run Water in Other Drains: Run water in floor drains, sinks, and bathtubs to restore water seals and prevent gases from entering your home.

6. Poor Septic System Maintenance

If your septic system has not been properly maintained, it can lead to a buildup of waste, excess gases, and foul odors. Neglecting to pump the tank regularly, overloading the system, or using harmful chemicals can all contribute to septic odors entering your home.

What You Can Do:

• Regularly Pump the Tank: Ensure that your septic tank is pumped every 3-5 years to remove waste buildup and prevent odor problems.
• Schedule Regular Inspections: A professional septic service can inspect the tank and drain field to ensure everything is functioning properly. They can identify potential issues before they become serious problems.

7. External Sources of Odor

In some cases, the smell of poop in your house may not be from your septic system at all. There could be external sources of odor, such as a nearby sewer line, a natural gas leak, or decaying organic matter near your home. If your septic system is functioning properly, but you still notice strong odors, it may be time to check for other potential sources.

What You Can Do:

• Inspect for Nearby Issues: If you suspect the smell is coming from an external source, inspect the area around your home. Look for signs of a sewer leak, decaying organic material, or gas leaks. If you suspect a gas leak, contact your local utility company immediately.
• Consult a Professional: If you are unable to identify the source of the smell, consider having a professional plumber or septic service provider inspect your home and system for any issues.

Conclusion

If your house smells like poop and you suspect the issue is related to your septic system, it’s important to address the problem quickly. Septic odors are often caused by issues like clogged vent pipes, an overfilled septic tank, or backflow from a damaged drain field. Regular maintenance, proper ventilation, and timely pumping of the tank can prevent most odor issues. If the smell persists or worsens, contact a professional to assess and resolve the problem.